TY - GEN
T1 - Eulerian–Lagrangian simulations of plume-induced sheared granular beds under Martian conditions
AU - Patel, Meet
AU - Rabinovitch, Jason
AU - Capecelatro, Jesse
N1 - Publisher Copyright:
© 2022, American Institute of Aeronautics and Astronautics Inc. All rights reserved.
PY - 2022
Y1 - 2022
N2 - This work presents a numerical investigation of shear-induced erosion in low pressure, high-speed environments. Conditions are chosen to be relevant to erosion of Martian regolith by rocket exhaust plumes. A three-dimensional compressible Eulerian–Lagrangian framework is utilized to simulate turbulent channel flow over a bed of solid particles. Eigenvalue analysis of the momentum exchange terms reveals an added constraint to the simulation timestep in the particle bed at low Martian densities. Simulations are performed across a range of Shields and Galileo numbers. We show that despite the low concentration of suspended particles in the free stream, the large density ratio between Martian regolith and ambient gas Pp /P = O(105 ) results in strong two-way coupling and relaminarization of the background turbulence.
AB - This work presents a numerical investigation of shear-induced erosion in low pressure, high-speed environments. Conditions are chosen to be relevant to erosion of Martian regolith by rocket exhaust plumes. A three-dimensional compressible Eulerian–Lagrangian framework is utilized to simulate turbulent channel flow over a bed of solid particles. Eigenvalue analysis of the momentum exchange terms reveals an added constraint to the simulation timestep in the particle bed at low Martian densities. Simulations are performed across a range of Shields and Galileo numbers. We show that despite the low concentration of suspended particles in the free stream, the large density ratio between Martian regolith and ambient gas Pp /P = O(105 ) results in strong two-way coupling and relaminarization of the background turbulence.
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U2 - 10.2514/6.2022-2193
DO - 10.2514/6.2022-2193
M3 - Conference contribution
AN - SCOPUS:85123889244
SN - 9781624106316
T3 - AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2022
BT - AIAA SciTech Forum 2022
T2 - AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2022
Y2 - 3 January 2022 through 7 January 2022
ER -